Premium
Removal of Rhodamine B from Water by Benzyl‐Functionalized Ionic Liquids
Author(s) -
Fan Yunchang,
Dong Xing,
Li Yun,
Zhong Yingying,
Miao Juan,
Hua Shaofeng
Publication year - 2016
Publication title -
clean – soil, air, water
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 66
eISSN - 1863-0669
pISSN - 1863-0650
DOI - 10.1002/clen.201500363
Subject(s) - rhodamine b , ionic liquid , rhodamine , ionic bonding , chemistry , nuclear chemistry , chemical engineering , materials science , organic chemistry , ion , fluorescence , catalysis , physics , optics , engineering , photocatalysis
The removal of rhodamine B by benzyl‐functionalized ionic liquids (ILs) from water was carried out. Effects of aqueous pH value, concentration of rhodamine B, phase volume ratio, and the presence of salt on the extraction efficiency have been investigated. Experimental results showed that the extraction efficiency of rhodamine B decreased with the increase of pH value. Thermodynamic studies indicated that hydrophobic interaction is the main driving force, besides, π–π stacking, electrostatic interaction, and salting‐out effect are also important for the extraction of rhodamine B. Notably, the quantitative extraction of rhodamine B into 1‐butyl‐3‐benzylimidazolium bis(trifluoromethylsulfonyl)imide ([C 4 Bzim]NTf 2 ) was achieved even at the phase volume ratio V w / V IL = 500:1. After extraction, [C 4 Bzim]NTf 2 , could be directly reused at least five times. These results suggest that the [C 4 Bzim]NTf 2 has potential application in the removal of rhodamine B from water.